@Ivan-Yu What are you using for power? Verify the power input and make sure you are not using a power supply that is out of specs for the Omegas. Also, it could be an issue on the dock itself, verify there are no solder points that overlap or touch, shorting something out.

The same as @Andrea-Cesari: mine gets pretty warm within first minutes of launching and keeps the same temperature independently of the CPU activity - but I can easily hold my finger on it, it does not get jalapeno-hot.